SONNWINN GmbH
Independent experts for photovoltaics and electricity storage
Technical inspections
- Metrological inspections
- Due diligence review
- Construction progress control
- Acceptance and commissioning
- End-of-warranty inspection
- Technical asset management
Expert opinions
- Yield assessments
- Revenue assessments for storage and PV
- Glare assessments
- Drainage assessments
- RPS analysis (RPS 2009)
- Damage assessments
Planning and consulting
- Concept design
- Battery storage sizing
- Component selection
- Service specification
- Tender support
- Support with system certification
2,000+
assessments in the SONNWINN network
700+
consulting, acceptance and due diligence
2.2 GWp+
capacity assessed
75+
battery storage projects supported
From the First Analysis to Decommissioning
Before construction
Initial analyses
Yield analysis, concept design and a candid view of the site — before money goes into detailed planning.
Planning
Component selection, specifications and tender support. Also as a review of designs prepared by others.
Yield and revenue
Bankable yield assessments, revenue assessments for storage and PV, simulations and self-consumption calculations.
Permitting
Glare assessments, noise forecasts, drainage assessments and roadside safety analyses.
Construction
Construction supervision
Progress monitoring and quality assurance on site — while defects can still be put right.
Acceptance and commissioning
Acceptance and commissioning tests with measurement equipment, certification and declaration of conformity.
Operation and decommissioning
Operation and recurring inspections
Recurring inspections, technical asset management and end-of-warranty inspections.
Damage and disputes
Damage assessments, defect assessments and reviews of existing expert reports.
Decommissioning or repowering
Decommissioning cost analysis for provisions — or the technical assessment for repowering.
Independent expertise
- Do you need a technical report or the support of an expert?
- Do you need a yield report?
- Are there any structural or planning defects in your PV system?
- Do you have doubts about the returns on your investment?
- Would you like to identify and report defects at the end of the warranty period?
- Do you need a glare assessment for your PV system?
- Is an acceptance or technical project review required?
- Should a periodic inspection of your system take place?
- Are you planning to expand your PV system with a storage system?
- Do you need support with technical project planning?
Then you’ve come to the right place. We are independent experts and engineers in the fields of photovoltaics and electricity storage. With years of experience and up-to-date expertise, we can provide you with competent support.
Broad base
SONNWINN has experts with different specialisations. In this way, we can provide you with competent support in all technical project steps: From analysing potential to preliminary planning and testing at the end of the warranty period. We also offer yield reports accepted by the banks as well as technical acceptance tests.
